Re: [Plib-devel] [PATCH] crease for ac3d files and speedup

[Wolfram K. <w_...@rz...>]

Mathias wrote:

>
>Hi all,
>
>During the past days I have done some profiling on flightgear. One final=
=20
>outcome of that work was, that most time is spent in ssg routines (yes, =
ssg=20
>not OpenGL!!). The problems are the huge amount of small leaf nodes we =
get=20
>from the ac file loader.=20

Yes. Actually some loaders like the MDL loader are even worse, if you
save out a normal CFS1 model directly after reading it from MDL into
an ascii format it can well be a GB (not a MB) in size! My fix is
simply to call the function to merge all hierachy nodes and to then
save as ssg. File size is then normally under a MB. The main reason is
simply that there are about 1000 times more nodes than needed.

Of course this HUGE overhead slows down rendering a lot.

>As a /sideeffect/ it was now easy to implement the crease tag for ac3d =
files.
>Ac3d models look now the same as in ac3d.

Great!

>Is sombody there with cvs write access to plib? Can somebody apply this =
patch,=20
>please?

If noone else does it, remind me again in a week.

>     Greetings
>
>            Mathias

Bye bye,
Wolfram.